Flue Gas Analysers

A must-have for professional boiler engineers and installers, we stock all of the most popular flue gas analysis tools including the Anton Sprint eVo range, the Kane 455 boiler analyser and Testo flue analysers.

Find out more about Flue Gas Analysers below.

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Testo 310 Flue Gas Analyser Testo 310 Flue Gas Analyser
In Stock : Get It Next Working Day*
Testo 310 Flue Gas Analyser
£346.00
£415.20 inc. vat
  • Standard or advanced kit (additional printer)
  • Easy and intuitive menu guidance
  • Digital customer data management via Testo Smart App
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Testo 327-1 Flue Gas Analyser - Standard Kit Testo 327-1 Flue Gas Analyser - Standard Kit
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Testo 327-1 Flue Gas Analyser - Standard Kit
£429.00
£514.80 inc. vat
  • Measure four parameters simultaneously
  • Fast response and easy to use
  • Ideal for those looking for an entry-level tester
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Testo 327-1 Flue Gas Analyser Standard Kit & Gas Leak Detector Testo 327-1 Flue Gas Analyser Standard Kit & Gas Leak Detector
In Stock : Get It Next Working Day*
Testo 327-1 Flue Gas Analyser Standard Kit & Gas Leak Detector
£471.12
£565.34 inc. vat
  • Testo Gas Leak Detector
  • Standard Case
  • Standard Probe
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Testo 300+ Flue Gas Analyser – Choice of Kit Testo 300+ Flue Gas Analyser – Choice of Kit
In Stock : Get It Next Working Day*
Testo 300+ Flue Gas Analyser – Choice of Kit
£474.00
£568.80 inc. vat
  • Fit with a NO sensor at point of purchase or retrospectively
  • Compatible with Testo Smart App & Testo 510i, 115i, & 915i Smart Probes
  • Available individually or as part of four kits
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Testo 327-1 Flue Gas Analyser Standard Kit, Gas Leak Detector, & CPA1 Probe Set
In Stock : Get It Next Working Day*
Testo 327-1 Flue Gas Analyser Standard Kit, Gas Leak Detector, & CPA1 Probe Set
£529.00
£634.80 inc. vat
  • Testo Gas Leak Detector
  • CPA1 Probe Set
  • Accessories and more
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Testo 327-1 Flue Gas Analyser - Advanced Kit with Printer Testo 327-1 Flue Gas Analyser - Advanced Kit with Printer
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Testo 327-1 Flue Gas Analyser - Advanced Kit with Printer
£548.50
£658.20 inc. vat
  • Comprehensive flue gas analyser kit
  • Includes Testo 327-1
  • Also comes with large amount of accessories
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Testo 327-1 Flue Gas Analyser Advanced Kit & Gas Leak Detector Testo 327-1 Flue Gas Analyser Advanced Kit & Gas Leak Detector
In Stock : Get It Next Working Day*
Testo 327-1 Flue Gas Analyser Advanced Kit & Gas Leak Detector
£578.50
£694.20 inc. vat
  • Testo Gas Leak Detector
  • A range of accessories
  • Printer
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Testo 327-1 Flue Gas Analyser Advanced Kit, Gas Leak Detector, & CPA1 Probe Set Testo 327-1 Flue Gas Analyser Advanced Kit, Gas Leak Detector, & CPA1 Probe Set
In Stock : Get It Next Working Day*
Testo 327-1 Flue Gas Analyser Advanced Kit, Gas Leak Detector, & CPA1 Probe Set
£648.50
£778.20 inc. vat
  • Testo Gas Leak Detector
  • CPA1 Probe Set
  • Printer, accessories and more
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Testo 300+ Smart Heat Pump Kit Testo 300+ Smart Heat Pump Kit
Stock Due : Estimated 1-2 Weeks
Testo 300+ Smart Heat Pump Kit
£916.88
£1,100.26 inc. vat
  • Install, service, & check gas boilers
  • Install, service, & check heat pumps
  • Includes 115i Clamp Thermometer & 510i Differential Pressure Smart Probes
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Testo 300 Flue Gas Analyser w/ NOx Sensor & Printer
Testo 300 Flue Gas Analyser w/ NOx Sensor & Printer
£1,245.00
£1,494.00 inc. vat
  • Measure O₂, CO and NOx gases
  • Supplied with a Bluetooth printer and thermal paper
  • Fast-response touchscreen display
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Testo 300LL Long-life Flue Gas Analyser Testo 300LL Long-life Flue Gas Analyser
In Stock : Standard Delivery*
Testo 300LL Long-life Flue Gas Analyser
£1,337.47
£1,604.96 inc. vat
  • Supplied with O₂ and CO sensors optimised for longevity
  • NO sensor can be added retrospectively
  • Available in two kits with or without a compatible Bluetooth/ IRDA printer
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Testo 300LL Long-life Flue Gas Analyser with Printer Testo 300LL Long-life Flue Gas Analyser with Printer
In Stock : Standard Delivery*
Testo 300LL Long-life Flue Gas Analyser with Printer
£1,498.06
£1,797.67 inc. vat
  • Testo 300LL Long-life Flue Gas Analyser
  • Bluetooth/ IRDA Printer
  • Spare Thermal Paper with Indelible Ink
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Testo 300LL Long-life Flue Gas Analyser with NOx Sensor & Printer Testo 300LL Long-life Flue Gas Analyser with NOx Sensor & Printer
In Stock : Standard Delivery*
Testo 300LL Long-life Flue Gas Analyser with NOx Sensor & Printer
£1,758.06
£2,109.67 inc. vat
  • Can calculate the total NOx measurement in mg/KWh for direct comparison with specified regulations
  • Bluetooth/ IRDA Printer
  • Spare Thermal Paper with Indelible Ink
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Testo 340 Flue Gas Analyser – Basic Combustion Kit
Made To Order
Testo 340 Flue Gas Analyser – Basic Combustion Kit
£2,515.00
£3,018.00 inc. vat
  • Fitted with O₂, CO and NO sensors and an integrated Bluetooth module
  • Optimised for industrial applications and environments
  • Extended measurement range for use in environments with high gas concentrations
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Testo 340 Flue Gas Analyser - NO₂/ NOx Kit
Made To Order
Testo 340 Flue Gas Analyser - NO₂/ NOx Kit
£3,030.00
£3,636.00 inc. vat
  • Suitable for inspecting industrial engines and burners
  • Equipped with O₂, CO, NO and NO₂ sensors
  • Integrated Bluetooth module allows the analyser to be operated remotely via the user’s smartphone
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Testo 340 Flue Gas Analyser - SO₂ Kit
Made To Order
Testo 340 Flue Gas Analyser - SO₂ Kit
£3,030.00
£3,636.00 inc. vat
  • Fitted with O₂, CO, NO and SO₂ Sensors and an integrated Bluetooth module
  • Compact and rugged design suitable for industrial environments
  • Extended measurement range suitable for inspecting industrial engines and burners
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Testo 340 Industrial Flue Gas Analyser – Fully Customisable
Made To Order
Testo 340 Industrial Flue Gas Analyser – Fully Customisable
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  • Choose three sensors: CO, COlow, NO, NOlow, NO2, or SO2
  • Supplied with an O2 Sensor as standard
  • Supports flow and pressure difference measurements
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Testo 350 Industrial Flue Gas Analyser – Fully Configurable
Made To Order
Testo 350 Industrial Flue Gas Analyser – Fully Configurable
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  • Provided with an oxygen sensor (O2)
  • Choose up to five more sensors
  • Measuring range extension function for analysing high gas concentrations
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Need Help? Read Our Flue Gas Analyser Buying Guide

About Flue Gas Analysers & Kits

At PASS we stock a wide range of gas detection and measurement, combustion and boiler servicing accessories for GasSafe Engineers. We are authorised distributors for leading brands such as Testo, Anton, Crowcon, TPI, and Kane and are committed to helping you get the right equipment for both commercial and domestic settings.

Whether you are looking for a standalone unit with or without an LCD screen or a smart analyser that can connect with Apps, there's plenty of choice at PASS. Check out some of our kit options that include useful accessories as well as additional tools for temperature measurements, flow and return, and pressure.

Frequently Asked Questions

What gases can a flue gas analyzer detect?

They typically measure parameters such as oxygen (O2), carbon dioxide (CO2), carbon monoxide (CO), nitrogen oxides (NOx), Nitric Oxide (NO), sulfur dioxide (SO2), and sometimes other gases or particulate matter. By analysing these components, users can optimise combustion processes for efficiency, minimise emissions of pollutants, and ensure compliance with regulatory standards.

What industries commonly use flue gas analysers?

They play a vital role in industries such as heating, power generation, automotive, and environmental monitoring, helping to improve energy efficiency, reduce environmental impact and ensure appliances are safe.

What is the difference between a flue gas analyzer (FGA) and a combustion analyser?

In general, there isn't a big difference between them as they are often used interchangeably to refer to devices that measure and analyse the composition of gases produced by combustion processes. However, there can be slight differences in how these terms are used depending on context and specific applications and devices.

They generally both measure gases emitted from combustion processes, such as those from boilers, furnaces, or engines. FGA's focus on measuring parameters like oxygen, carbon dioxide, carbon monoxide, nitric oxide, nitrogen oxides, and other combustion-related gases. They are commonly used in heating, power generation, and environmental monitoring industries. Combustion analysers may offer additional features such as calculating combustion efficiency, stack draft, and performing other diagnostic functions beyond basic gas analysis.